Worcester Bosch EA fault

Worcester Bosch EA fault

The Worcester Bosch boiler EA fault code is a common error indicating that the boiler has failed to ignite. This can be due to several reasons, including issues with gas supply, the ignition system, or a problem with the flue or condensate pipe. Here’s a breakdown of what the EA fault code means and how it can be addressed:

Causes of the EA Fault Code

  1. Gas Supply Issues: The boiler may not ignite if there is a problem with the gas supply. This could be due to the gas valve being turned off, low gas pressure, or a fault in the gas valve itself.
  2. Ignition Failure: The ignition system might be failing to ignite the gas. This could be due to a faulty ignition electrode, problems with the ignition leads, or a failure in the control board that manages the ignition process.
  3. Flue or Air Supply Blockages: The boiler needs a certain amount of air to ignite properly. If the flue or air inlet is blocked, it can prevent ignition.
  4. Condensate Pipe Issues: In cold weather, the condensate pipe may freeze, causing a blockage. This can lead to ignition problems as the boiler fails to dispose of condensation effectively.

Troubleshooting the EA Fault Code

  1. Check the Gas Supply: Ensure that the gas supply to the boiler is turned on and that there are no issues with the gas pressure. You may need to contact your gas supplier to check the pressure.
  2. Reset the Boiler: Sometimes, simply resetting the boiler can clear the fault and allow the boiler to attempt ignition again.
  3. Inspect the Condensate Pipe: If the weather is cold, check the condensate pipe for freezing. If it is frozen, carefully thaw it using warm water or a heat wrap.
  4. Seek Professional Help: If the above steps do not resolve the issue, it’s important to call in a Gas Safe registered engineer. They can diagnose and repair issues with the ignition system, flue, air supply, or condensate pipe.
  5. Regular Maintenance: To prevent future issues, ensure your boiler receives regular servicing and maintenance by a qualified professional. This can help identify and resolve minor issues before they lead to fault codes.


The EA fault code on a Worcester Bosch boiler indicates a problem with the ignition process. While some troubleshooting steps can be taken by the homeowner, such as checking the gas supply and resetting the boiler, more complex issues should be addressed by a professional. Regular maintenance is key to ensuring your boiler runs efficiently and minimizes the risk of fault codes